TIDA-03050

Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design

TIDA-03050

Design files

Overview

This reference design shows how to detect current from the mA-to-KA range using a busbar-type shunt resistor. The increasing demand of high-capacity batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) drives the requirement for larger current spans and highly-accurate current sensors. Obtaining a good accuracy over three decades (mA to A, 1 A to 100 A, and 100 A to 1000 A) is quite challenging due to large amounts of noise in the system. This design solves this problem by using a high-resolution analog-to-digital converter (ADC) and high-accuracy current shunt monitors from TI.

Features
  • Full-scale accuracy of:
    • 0.02% full-scale range (FSR) for < 20A and < 0.05% FSR for 20A to 1500A at 25°C
    • 0.1% FSR for < 20A and 0.25% FSR for 20A to 1500A at 50°C
  • Suitable for 50mA to 1500A range current measurement; configurable to varied current spans
  • High-side sensing and low-side sensing
  • Supports bi-directional current
  • Bi-directional current measurement:  -1500A to +1500A

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUD33A.PDF (1201 K)

Reference design overview and verified performance test data

TIDRSW2.PDF (302 K)

Detailed schematic diagram for design layout and components

TIDRSW3.PDF (53 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRSW4.PDF (103 K)

Detailed overview of design layout for component placement

TIDRSW6.ZIP (476 K)

Files used for 3D models or 2D drawings of IC components

TIDCDV8.ZIP (419 K)

Design file that contains information on physical board layer of design PCB

TIDRSW5.PDF (511 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Current sense amplifiers analog output

INA240-Q1AEC-Q100, -4 to 80V, bi-directional, ultra-precise current sense amplifier w/ enhanced pwm rejection

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Digital temperature sensors

LMT01-Q1Automotive Grade, 0.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface

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Linear & low-dropout (LDO) regulators

TPS709-Q1Automotive 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection

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MSP430 microcontrollers

MSP430F552925 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

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Precision ADCs (<=10MSPS)

ADS1259-Q1Automotive, 24-bit, 14.4kSPS, 1-ch delta-sigma ADC w/ low-drift Vref for high-dynamic range systems

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Precision op amps (Vos<1mV)

OPA320-Q1Automotive Qualified, Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier ;

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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* Design guide Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design (Rev. A) Dec. 18, 2017

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